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AIR CONDITIONING CHOICES
There are two basic types of auxiliary air systems:
• Self-contained “package” units
• Split systems
The self-contained unit is designed to be wholly mounted inside the truck, usually under a berth or seat or inside a
side storage locker. All of the air conditioning components, including the compressor, condenser, evaporator, blower
and power supply, are mounted on a single low-profile chassis with an aluminum cover. The system’s closed refrigerant
loop is precharged and sealed at the factory. Inside air is pulled across the evaporator coil, and cooled air is blown
through a flexible duct to a discharge grill for discharge into the living area. Hot air is discharged from the condenser
through cutouts in the floorboard.
Dometic’s patented split systems consist of
two separate modules. The outside unit
contains the condenser and cooling fan. It
is bolted horizontally to the underside or
vertically to the back of the sleeper. The inside
unit contains the compressor, evaporator,
blower, power-logic box and other associated
components. The inside unit is mounted
under a berth or seat or in a side storage
locker. The two units are connected by
reusable precharged quick-connect refrigerant
linesets. The system is designed so that
both units automatically charge to the
correct refrigerant pressure as soon as the
linesets are connected. No special tools
are required.
Each approach offers advantages and
disadvantages.A self-contained unit is
simpler to install and maintain, since it
does not have any external refrigerant lines.
It is also less expensive than a split system
of the same BTU capacity. On the other
hand, it takes more interior space, and it
requires cutting holes in the floorboard
for air to flow to and from the condenser.
A split system, on the other hand, has more
installation flexibility and uses less interior
space. It also is quieter, since the condenser
fan is located outside the truck.
Both types of air conditioning systems can
include built-in electrical heat modules. The
heat is blown through the same ducts and
grills and controlled by the same thermostat.
They can also be used in conjunction with a
diesel-fired heater if desired, under control
of the same thermostat.
Whichever type of system you select, it
will come with ducts, grills, condensate
drains, thermostat controls and electrical
wiring.
Heating Capacity Application
1.0 KW 48 in. sleeper
1.5 KW 60 in. sleeper
2.0 KW 72 in. sleeper
Split system inside unit beneath bunk.
Self-contained unit beneath bunk.
Split system outside condensing unit.